Kyle Blanks capped one of the Padres’ greatest weeks ever at Petco Sunday afternoon with a tie-breaking three-run, eighth-inning homer that gave the hosts a 4-1 win over the Arizona Diamondbacks.

The mood in the clubhouse was euphoric.

For the first time since the end of the 90-72 season of 2010, the Padres are on the plus side of .500.

Back-to-back series sweeps of division leaders Atlanta and Arizona raised the Padres overall record since April 24 to 30-19 – and a more impressive 21-7 at home. The Padres are within two games of the National League West lead.

But the Padres list of injured players continues to expand toward the breaking point.

Shortstop Everth Cabrera, who has emerged as an All-Star candidate while starting every game, suffered a left hamstring injury of unknown severity just before Blanks’ game-winning blast Sunday.

And Carlos Quentin could be a candidate for the disabled list with a left shoulder strain that has sidelined the left fielder the past two games.

“We have a few players banged up,” Padres manager Bud Black said while his club was still celebrating the 6-0 homestand.

So banged up, that the Padres might play short-handed the next two or three days in San Francisco just to see if Cabrera and Quentin can avoid joining three already injured starters -- second baseman Jedd Gyorko (right groin strain) first baseman Yonder Alonso (fracture of the third metacarpal in his right hand) and center fielder Cameron Maybin (out six to 10 weeks with PCL strain in his right knee) -- on the disabled list.

“We showed the depth we have this week by playing like we have without Gyorko, Alonso and Maybin,” said Blanks, who is a very large part of that depth. “It’s a testament to everyone in this room . . . everyone is on the same page and moving forward.”

But can the Padres continue to advance if they are five regulars short?

“Good question,” said third baseman Chase Headley. “But this is a good team . . . a really good team . . . deserving of everything that is happening.”

“Competitive,” is how closer Huston Street described the Padres. “We lack the superstars that some teams have. We don’t have the history of winning that some teams have.

“But we’ve got a lot of guys who can play. And we’ve got a lot of guys who believe in each other. That’s an element you can’t fake. And it’s like that throughout the lineup and the roster. Today was the perfect example.”

Consider Blanks.

On June 6, Blanks was en route to Triple-A Tucson when the Padres learned Alonso was headed to the disabled list. Blanks was detoured to Colorado. In 10 games since his reprieve, Blanks has hit .375 (12-for-32) with four homers, three doubles, 10 RBIs and nine runs scored.

“Kyle is really playing well,” said Black. “He is a big man with raw power, legitimate power.”

With the wounded Cabrera on second with his third single of the game and Headley on first with a two-out walk, Blanks lined a “hanging breaking ball” from Arizona reliever David Hernandez onto the first balcony of the Western Metal Supply Co. building.